Most arguments for government intervention put the cart before the horse. They begin by asking whether a restriction might be useful rather than whether anyone has the right to impose it.
Liberty should be the default, and government intervention the exception. The classical liberal ideal of the presumption of liberty puts the burden of justification on those who would restrict freedom, not on those who wish to exercise it. The presumption of liberty rests on the moral equality of individuals. No person is naturally entitled to rule another; therefore, restrictions on peaceful action require justification.
A useful way to understand the presumption of liberty is through the more familiar presumption of innocence. In criminal law, the accused does not have to prove that they deserve to remain free. The state must prove that it is justified in punishing them.
The presumption of liberty extends a similar principle beyond the courtroom. People should be free to act unless there is sufficient justification for restricting them. The burden of justification rests on those who would interfere with individual liberty. The presumption of liberty does not mean people may do whatever they please regardless of the impact on others. It is a presumption in favor of people doing what they please with their own lives, consistent with everyone else’s equal freedom to do the same.